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-rw-r--r--src/mess/drivers/altair.c151
1 files changed, 151 insertions, 0 deletions
diff --git a/src/mess/drivers/altair.c b/src/mess/drivers/altair.c
new file mode 100644
index 00000000000..7debe14d708
--- /dev/null
+++ b/src/mess/drivers/altair.c
@@ -0,0 +1,151 @@
+/***************************************************************************
+
+ MITS Altair 8800b Turnkey
+
+ 04/12/2009 Initial driver by Miodrag Milanovic
+
+ Commands:
+ All commands must be in uppercase. Address and data is
+ specified in Octal format (not hex).
+
+ Press space to input your command line (not return).
+
+ D - Memory Dump
+ J - Jump to address
+ M - Modify memory
+
+****************************************************************************/
+
+#include "emu.h"
+#include "cpu/i8085/i8085.h"
+#include "machine/terminal.h"
+#include "imagedev/snapquik.h"
+
+
+class altair_state : public driver_device
+{
+public:
+ altair_state(const machine_config &mconfig, device_type type, const char *tag)
+ : driver_device(mconfig, type, tag),
+ m_maincpu(*this, "maincpu"),
+ m_terminal(*this, TERMINAL_TAG)
+ ,
+ m_ram(*this, "ram"){ }
+
+ required_device<cpu_device> m_maincpu;
+ required_device<generic_terminal_device> m_terminal;
+ DECLARE_READ8_MEMBER(sio_status_r);
+ DECLARE_READ8_MEMBER(sio_data_r);
+ DECLARE_READ8_MEMBER(sio_key_status_r);
+ DECLARE_WRITE8_MEMBER(sio_command_w);
+ DECLARE_WRITE8_MEMBER(kbd_put);
+ UINT8 m_term_data;
+ required_shared_ptr<UINT8> m_ram;
+};
+
+
+
+READ8_MEMBER(altair_state::sio_status_r)
+{
+ return (m_term_data) ? 1 : 2;
+}
+
+WRITE8_MEMBER(altair_state::sio_command_w)
+{
+
+}
+
+READ8_MEMBER(altair_state::sio_data_r)
+{
+ UINT8 ret = m_term_data;
+ m_term_data = 0;
+ return ret;
+}
+
+READ8_MEMBER(altair_state::sio_key_status_r)
+{
+ return (m_term_data) ? 0x40 : 0x01;
+}
+
+static ADDRESS_MAP_START(altair_mem, AS_PROGRAM, 8, altair_state)
+ ADDRESS_MAP_UNMAP_HIGH
+ AM_RANGE( 0x0000, 0xfcff ) AM_RAM AM_SHARE("ram")
+ AM_RANGE( 0xfd00, 0xfdff ) AM_ROM
+ AM_RANGE( 0xff00, 0xffff ) AM_ROM
+ADDRESS_MAP_END
+
+static ADDRESS_MAP_START(altair_io, AS_IO, 8, altair_state)
+ ADDRESS_MAP_UNMAP_HIGH
+ ADDRESS_MAP_GLOBAL_MASK(0xff)
+ AM_RANGE( 0x00, 0x00 ) AM_READ(sio_key_status_r)
+ AM_RANGE( 0x01, 0x01 ) AM_MIRROR(0x10) AM_READ(sio_data_r) AM_DEVWRITE(TERMINAL_TAG, generic_terminal_device, write)
+ AM_RANGE( 0x10, 0x10 ) AM_READWRITE(sio_status_r,sio_command_w)
+ADDRESS_MAP_END
+
+/* Input ports */
+static INPUT_PORTS_START( altair )
+INPUT_PORTS_END
+
+
+QUICKLOAD_LOAD(altair)
+{
+ altair_state *state = image.device().machine().driver_data<altair_state>();
+ int quick_length;
+ int read_;
+ quick_length = image.length();
+ if (quick_length >= 0xfd00)
+ return IMAGE_INIT_FAIL;
+ read_ = image.fread(state->m_ram, quick_length);
+ if (read_ != quick_length)
+ return IMAGE_INIT_FAIL;
+
+ return IMAGE_INIT_PASS;
+}
+
+
+static MACHINE_RESET(altair)
+{
+ altair_state *state = machine.driver_data<altair_state>();
+ // Set startup addess done by turn-key
+ cpu_set_reg(machine.device("maincpu"), I8085_PC, 0xFD00);
+
+ state->m_term_data = 0;
+}
+
+WRITE8_MEMBER( altair_state::kbd_put )
+{
+ m_term_data = data;
+}
+
+static GENERIC_TERMINAL_INTERFACE( terminal_intf )
+{
+ DEVCB_DRIVER_MEMBER(altair_state, kbd_put)
+};
+
+static MACHINE_CONFIG_START( altair, altair_state )
+ /* basic machine hardware */
+ MCFG_CPU_ADD("maincpu", I8080, XTAL_2MHz)
+ MCFG_CPU_PROGRAM_MAP(altair_mem)
+ MCFG_CPU_IO_MAP(altair_io)
+
+ MCFG_MACHINE_RESET(altair)
+
+ /* video hardware */
+ MCFG_GENERIC_TERMINAL_ADD(TERMINAL_TAG, terminal_intf)
+
+ /* quickload */
+ MCFG_QUICKLOAD_ADD("quickload", altair, "bin", 0)
+MACHINE_CONFIG_END
+
+/* ROM definition */
+ROM_START( al8800bt )
+ ROM_REGION( 0x10000, "maincpu", ROMREGION_ERASEFF )
+ ROM_LOAD( "turnmon.bin", 0xfd00, 0x0100, CRC(5c629294) SHA1(125c76216954b681721fff84a3aca05094b21a28))
+ ROM_LOAD( "88dskrom.bin", 0xff00, 0x0100, CRC(7c5232f3) SHA1(24f940ad70ad2829e1bc800c6790b6e993e6ebf6))
+ROM_END
+
+/* Driver */
+
+/* YEAR NAME PARENT COMPAT MACHINE INPUT INIT COMPANY FULLNAME FLAGS */
+COMP( 1975, al8800bt, 0, 0, altair, altair, driver_device, 0, "MITS", "Altair 8800bt", GAME_NOT_WORKING | GAME_NO_SOUND_HW)
+